Warp stop-motion for looms



E. L. TINKHAM.

WARP STOP MOTION FOR LOOMS. APPLICATION FILED IAN. I5. I92I.

Patented July 26, 1921.

ZSHEETIS-ISHEIITL .L. TINKHAM.

ooooooooooooooooooooo s. APPLICATION FILED IAII.I5, |921.

Patented July 26, 1921. 2 SSSSSSSSS E`T 2- Vventedv an Improvement 4inWarp Unirse stares .eATaNT ePrice.

EUGENE L. TINKI-IAM, OF I-IOLPEDALE, MASSACHUSETTS, ASSIGNOR'TO DRAPERCORPORATION, OF HOPEDALE, IYASSACI-IUSETTS, A CORPORATION OF MAINE.

WARP STOP-MOTION FORKLOOMS. i

Application filed January 15, 1921.

To all whom it may concern Be it known that I, lEUGENE L. TINKHAM, acitizen of the United States, and resid.- ing at Hopedale, in the countyof l/Vorcester and State of .Massachusetts, haiga intop- Motions forLooms, of which the following description, in connection with theaccompanying drawings, is a specification, like characters on thedrawings representing like parts.

This invention relates to warp stop motions whereby when a warp threadbreaks or becomes too slack, loom stoppage is effected. Y

When a warp thread breaks or becomes too slack for the production ofperfect cloth, it is desirable that the loombe stopped to enable theloom attendant to correct the fault either by piecing the f. broken warpthread or correcting its slack condition. Various types of warp stopmotions have heretofore been devised, but much time is lost andinconvenience experienced by the loomv attendant in nding the faultywarp thread. The drop wires are usually arranged in rows very closetogether, and when a warp thread breaks or becomes too slack, the dropwire controlled by that warp thread will drop, and in the constructionsheretofore devised, will effect loom stoppage. When the attendant seeksto locate the defective warp thread there is nothing to indicate itsposition, and in some cases means independent of the warp stop motion.have been proposed lfor enabling the loom attendant to locate the fallendrop wire. Y Such means, however, add to the complication of the loommechanism, and is not always satisfactory.

One of the objects of the present invention is to provide a warpstopmotion which in itself'and by reason of the fallen drop wire, shallself-indicate the position of the broken or slack warp thread. Animportant feature of the present invention, therefore, consists in aplurality of drop -wires arranged in two rows and a detector whichis'positioned between adjacent rows of drop' wires, the erop wires ercach- Specaation of Letters Patent.A

-vide a warp and the`vl v Patented July 26;, 1921. Serial No. 437,581.

detector being so constructed and arranged that when a drop wire ofeither row fails to be supported by its warp thread, it will embrace orstraddle a portion of the detectcr and be bent by the'detector beforethe latter is stopped, to thereby separate the drop wires of the row inwhich the fallen drop wire is located. Thusthe loom attendants attentionis at once 'directed to the location ofthe defective or broken warpthread. i

Another object of the invention is to prok stop motion of simpleconstrue be eHective not only to stop the defective warp tion which willthe loom, but to locate thread.` l y The above and other features of theinvention will be described in connection with the accompanying drawingswhich show lone good, practical lform of the invention,

wherein: y

Figure l is a perspective view of a sufficient portion of a warp stopmotion to make clear the construction and mode of operation of thepresent invention, some of the parts being omitted or broken away forclearness of illustration;

Fig. 2 is a detached perspective view of a portion :of a warp stopmotion showing the condition of parts whenv a drop wire fails to besupported by its warp thread; and Y Fig. 3y is a rear elevation` of aportion of the warp stop motion showing the separated relation of thedrop wires of a row wherein one of the drop wires has been released byits warp thread. In the present invention the drop wires are arranged inrows and the detector is positioned between the adjacent rows of dropwires. The detector-and drop 'wire guides may be supported upon abracket vsecured to the sides of the loom frame, and a train ofmechanism is associated with the detector for ingv movement and tceffect loom stoppage givingpthe detector its detect-i when thedetectingmovement is arrested Ydetails of such mechanism a portion ofthe are now well known and illustration of the has not herein been made,since they are well understood and do not form part of the present in*vention.

In the drawings: 1 represents a lug or projecting bracket extending fromone side of the loom frame, it being understood that a similarconstruction is provided at the opposite side of the loom. Adjustablymounted upon the projecting bracket 1 is the vsupport 2 which may beconveniently adjusted with respect to the bracket by the bolt 3 and slot4. 4The support 2 carries the side member 5 of the warp stop motionwhich consists of a plate whichmay -be integral with or secured to thesupport 2, one of such plates being at each side of the loom.

Mounted in suitable bearings at the top of the side plates are the rods6 which extend transversely of the loom and are clamped. in place by setscrews 7 which may be conveniently formed in the top 8. Below the rodsare the rods 9 which also extend transversely of the loom and have theiropposite ends supported in the side plates 5 as indicated in Fig.guidingmeans for the drop wires, theyy are herein shownas circular incross section', it is obvious they `may be otherwise arranged. The dropwires 10 are provided with openings 11 through which the guides 6extend, Fig. 1. Thelower portion of the drop wires 10 have the openslots 12 through which pass the warp threads a. The warp threads a passover the lower guide rods 9 and when they are in normal weavingcondition, they support the weight of the drop wires, preferably onewarp thread passing through each drop wire.

Each drop wire is provided with a laterally offset finger v13 which,extends downwardly, and as'will later appear, embraces detector when anyone of the drop wires of' either row fails to be supported by a warpthread. The offset relation of the vfingers 13with respect to the mainbody of the drop wires provides a space 14 into which is received aportion of the detector when a drop wire is released by its warp thread.The detector is positioned between the two rows of drop wires. In thepresent instance it is 'formed as a tube 15 having an open slot 16extending longitudially .from one tothe other side of the loom, asindicated in Fig. 1.

- The kdetector is mounted for rocking movement in the side plates andis supported b bearings-17, one of which is indicated in .l-ig. 1, anddetecting movement is imparted to the detector by ra train of'mechanismwhich, 4in the `present instance imparts to and while the detector anoscillating or rocking move.

ment. Secured to the detector at one por- 1. The rodsand 9 affordtionthereof is the collar 18, Fig. 1. i A set screw 19 affords a means ycuring the collar 18 to the detector. Extend# ing from the collar 18 isthe arm 20 to which is connected the link 21, the other end of the linkbeing connected at 22 with a rocking lever 23 pivoted at 211 in one ofthe side plates El, Fig. 1. The rocking lever 23 is extended downwardlyat 25 and is connected at its lower end to the end the other end of saidlink being connected at 27 to a lower arm shaft 29. The rock shaft 29 isappropriately supported as by I plates 5, the construction being suchthat rocking movement being impartedto the rock shaft 29, will transmitthrough the train of mechanism oscillating movement to the detector 15.the rock shaft 29 is connected mechanism of usual` construction now wellknown in the art, for effecting loom stoppage when the rocking movementVof the rock shaft is arrested as by the arrest of the detector by adrop wire. f

of the link 26,V

al train of for adjustably se- L 28 mounted on therock l the bearings 30in the side described, a rocking or The detector 15,: which ashereinbefore stated, is positionedr between twoprows of drop wires, hasportions 31 and 32 formed, in 'the present instance, by the upper slotonopening 16. lhen thewarp threads Vare in normal weaving conditionasthreads a support the drop wires with the laterally offset fingers abovethe slotr16 of the detector and the detector is permitted to partake ofits detecting movement. When, however, a warp thread breaks o becomestoo slaclnrthe associated drop wire is permitted to drop as indicated inFig. 2, whereupon, aportion of the detector, (the edge 31 asindicat'ied'in Fig. 2) .is embraced betweenthe offset fingerv 13 and themain body of' the drop wire, and before the detector is brought to restby the released'drop wire, the drop wire itself is distortedV or bent asindicated in Figs. causing the adjacent drop wires inthe same row withthe released drop wire to be sepa.- rated laterally as'indicated in Fig.3, which at once makes apparent to theloom attendant or weaver thelocation of the faulty warp thread.v

It will be noted either. row is released by its'warp thread, the offsetfinger 13 vwill recess in the top the detector, as it moves of dropwires in Vwhich wire is situated, the drop wire between theupperfandlower guides 6 and 9 as indicated in-Fig. 2; and` since the main body ofth'e drop wire rests lagainst the exterior Ysurface of the detector, thebending action is'emphasized in turning the drop wire substantially intothe kposition away from thel row Vthe releasedfdro'p indicated in Fig.1A, the'warpV 2 and 3, thereby' that when a. dropiiwire of exerts abendingfor'ce upon two drop wire engaging shown in Fig. 3, whicheff'ects a separation of the adjacent drop wires of the same row,with'the result that the weavers attention is at once directedto theposition of the faulty warp thread. 'n y The main bodyv portion of thedro-p wires in the zone of action of the detector, are preferablynarrowed or made more fiexible so that the bending action to effect theseparation of drop wires of a row is facilitated without injury to thedrop wires themselves.

What is claimed is:

l. In a warp stop motion for looms, the combination or" a plurality ofdrop wires arranged in parallel rows and normally supported by the warpthread during weaving, a detector positioned between the rows of dropwires and coperating with the drop wires of either row and having adetecting movement, each of the said drop wires being provided with akdetecte-r embracing portion which embraces the detector and arrests itsdetecting movement when a drop wire of either row fails to be supportedby a warp thread.

2. In a warp stop motion for looms, the combination of a plurality ofdrop wires arranged in rows and normally supported by the warp threadsduring weaving, a detector positioned between adjacent rows of dropwires to coperate with the drop wires of either row and having adetecting movement wholly between the rows of drop wires, each of thedrop wires being provided with a projecting finger extending downwardlyto engage and arrest the detector whenl a drop wire fails to besupported by a warp thread.

3. In a warp stop motion for looms, the combination of a plurality ofdrop wires arranged in parallel rows, a detector positioned betweenadjacent rows of' dropwires to c0- operate with the drop wires of eitherrow and having a detecting movement wholly between the rows, the dropwires of adjacent rows having at their adjacent edges detectorembracingportions which are normally held out of engagement with the detector bynormal warp threads during weaving and which .are constructed andarranged to embrace a portion of the detector and arrest its detectingmovement when any drop wire fails to be supported by a warp thread.

In a warp stop motion f'or looms, the combination of a plurality of dropwires arranged in parallel rows and having downwardly extending detectorengaging fingers on the adjacent edges of the drop wires of the tworows, a. detector supported for detecting movement between two adjacentrows of drop wires to coperate with the drop wires of either row, twodrop wire engaging portions on the detector, one for engagmg a droppedwire of one row and the other for engaging a dropped ,wire of theadjacent row for arresting movement of the f combination of a .and

detector 'when a drop wire of either row fails to bei supported by itswarp thread and effecting a bend in the drop wire to separate it fromadjacent drop wires in thel same row.

5. In a warp stop motion for looms, the combination of a plurality'ofdrop wiresarranged in two rows and each having an offset finger, guidesfor directing the movement of a drop wire, and a detector positionedbetween adapted to engage the offset finger of a drop wire of either rowwhen it f'ails to be supported by a warp thread and to bend the dropwire and indicate the position of the defective warp thread.

6. In a warp stop motion for looms, the combination of a plurality ofdrop wires arranged in two rows and the drop wires of each` row havingflexing projections on their edges adjacent the opposite row, a detectorpositioned between the two rows of dro-p wires and having two detectingedges, one for coperating with the flexing fingers of one row of dropwires and the other for cooperating with the flexing fingers of theother row to fiex or bend a drop wire in either row and indicate thelocation of the deflector warp thread when a drop wire fails to besupported by its warp thread.

In a warp stopmotion for looms, the

plurality of drop wires arranged in two rows, a detector positionedbetween the two rows of drop wires and having two detecting edges, eachof the drop wires in one row having a downwardly-exfinger laterallyseparated from the the drop wire toward the opposite row to straddle oneof the detecting edges of the detector when the drop wire fails to besupported by its warp thread and effect separation of the drop wires ofthe same row to indicate the location of the defective warp thread.

8. In a warp stop motion for looms, the combination of a plurality ofdrop wires arranged in two rows and each having a downwardly-extendingfinger which is offset from the body of the drop wire toward theadjacent row, a guide for the drop wires, a detector positioned betweenthe drop wires of' adjacent rows and having a slotted portion the tworows of drop wires and llO extending longitudinally thereof into whichthe downwardly-extending finger of a drop wire of either row extendswhen the drop wire fails to be supported by a warp thread, means foroscillating the detector to effect a bend in the drop wire before themovement of said means-is arrested by the finger of the drop wire.

In a warp stop motion for looms, the combination of a plurality of dropwires arranged in two rows and each having a downwardly-extending fingerwhich is offset Yfrom the body of the drop wire toward the adjacent row,a guide for the drop wires, a de teetor positionedbetween the adjacentrows and having longitudinally thereof intol which extending drop vwiresof a slotted portion the downwardly extending finger of a drop 5 wireofvreither row wlrefsnls to be support and Ineens orvceusing extendswhen. the drop ed by fa warp thread, the detector to exert

